iteration: add simple iteration function

iteration/iter.go

@@ -0,0 +1,12 @@
+package iteration
+
+const repeatTime = 5
+
+// Repeat takes a string and repeat it 5 times
+func Repeat(s string) string {
+	var res string
+	for i := 0; i < repeatTime; i++ {
+		res += s
+	}
+	return res
+}

iteration/iter_test.go

@@ -0,0 +1,12 @@
+package iteration
+
+import "testing"
+
+func TestRepeat(t *testing.T) {
+	repeated := Repeat("a")
+	expected := "aaaaa"
+
+	if repeated != expected {
+		t.Errorf("expected %q but got %q", expected, repeated)
+	}
+}